Questions tagged [canvas]

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Determine if Division on User's Screen Has Rendered Any Non White Pixels

I have a division containing AdSense code. The Adsense code writes code for an ad to the division. This code then creates an ad; or it creates a blank space the size of an ad; or it leaves the space ...
1
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1answer
522 views

<canvas> for chartjs versus AMP

On my WordPress blog in default mode I have a <canvas> where I draw a chart with ChartJS. I've just downloaded the AMP plugin, run the Google AMP Test tool, and it says: Fix the following ...
2
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1answer
62 views

Is it cloaking to hide a <canvas> and display a message for mobile browsers?

I have a simple website with a single page containing a canvas element that is rendering a video game. I have a script on this page that hides the canvas element and displays a special message when ...
2
votes
1answer
436 views

HTML canvas editor

I'd like to implement a very simplistic image editor (similar to http://mugtug.com/sketchpad/) on my website, so that users can have a trivial playground. Say I have a black and white sketch (png) ...
15
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5answers
5k views

Can text content in an HTML5 <canvas> element be indexed by search engines?

I was wondering if content in an HTML5 canvas element has any positive/negative effects on SEO, or if it is indexed at all.